Even 6 weeks is soon.
I wrote this answer in another thread to someone who had a similar question.

Quote:

Just judge by your own.
If you think it's healed and doing alright, then change it.
Changing it before it's been healed will only irritate it and it could possibly get infected, swell and complications may set in.

If you do change it a little early though, be very careful, and go straight to the piercers if you have any trouble.
Good luck.
Post pictures so we can see (:

So yea, seeing as it's already been re-pierced then the risk of infection and complications is even higher.
If you think the bar is the problem, then I would go back to your piercers and they can judge if it needs to be changed.